NXP Semiconductors PXN2020, Справочное руководство, Страница: 665 / 1376

FlexRay Communication Controller (FlexRAY)
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor 26-51
26.5.2.45 Slot Status Counter Condition Register (SSCCR)
This register is used to access and program the four internal non-memory mapped Slot Status Counter
Condition Registers SSCCR0 to SSCCR3. Each of these four internal slot status counter condition
registers defines the mode and the conditions for incrementing the counter in the corresponding
Slot Status
Counter Registers (SSCR0–SSCR3) . The correspondence is given in Table 26-54 . For a detailed
description of slot status counters, refer to Section 26.6.18.4, Slot Status Counter Registers.
SEL Selector — This field selects one of the four internal slot status selection registers for access.
00 Select SSSR0.
01 Select SSSR1.
10 Select SSSR2.
11 Select SSSR3.
SLOTNUMBER Slot Number — This field specifies the number of the slot whose status will be saved in the corresponding
slot status registers.
Note: If this value is set to 0, the related slot status register provides the status of the symbol window after the
NIT start, and provides the status of the NIT after the cycle start.
Table 26-52. Mapping Between SSSRn and SSRn
Internal Slot
Status Selection
Register
Write the Slot Status of the Slot Selected by SSSRn for each
Even Communication Cycle Odd Communication Cycle
For Channel B
to
For Channel A
to
For Channel B
to
For Channel A
to
SSSR0 SSR0[15:8] SSR0[7:0] SSR1[15:8] SSR1[7:0]
SSSR1 SSR2[15:8] SSR2[7:0] SSR3[15:8] SSR3[7:0]
SSSR2 SSR4[15:8] SSR4[7:0] SSR5[15:8] SSR5[7:0]
SSSR3 SSR6[15:8] SSR6[7:0] SSR7[15:8] SSR7[7:0]
Base + 0x0066 16-bit write access required Write: Anytime
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0 0
SEL
0
CNTCFG MCY VFR SYF NUF SUF STATUSMASK[3:0]
W WMD
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 26-45. Slot Status Counter Condition Register (SSCCR)
Table 26-51. SSSR Field Descriptions (continued)
Field Description